Russia's antimonopoly agency has ordered Google to amend agreements with smartphone producers that it said disadvantage third-party applications on devices running the Android operating system.

The Federal Antimonopoly Service (FAS) said on October 5, "To restore competition on the market, Google should amend agreements with mobile-device producers within a month and exclude the anticompetitive clauses."

The FAS ruled last month that California-based Google violated the law by preinstalling certain applications on mobile devices and prioritizing those icons on screens.

The regulator said Google may face a fine of up to 15 percent of the revenue from the services where the violation occurred.

The ruling followed a complaint from Russian search-engine provider Yandex, which has been losing market share to its U.S. rival on mobile devices.